Table 1.
Dosimetric comparison of scan protocols.
| Scanner | Voltage [kVp] |
Current–time product [mAs] |
CTDIvol [mGy] |
|---|---|---|---|
|
MDCT Siemens SOMATOM Force |
Effective per scan | ||
| 70 | 50.0 | 1.3 | |
| 70 | 97.0 | 2.7 | |
| 80 | 122.0 | 5.1 | |
| 70 | 199.0 | 5.3 | |
| Sn 100 | 898.0 | 7.5 | |
| Sn 150 | 146.0 | 8.2 | |
| 100 | 113.0 | 9.8 | |
| 80 | 241.0 | 10.2 | |
| 120 | 101.0 | 14.1 | |
| 140 | 96.0 | 18.9 | |
| 100 | 227.0 | 19.5 | |
| 80 | 489.0 | 20.3 | |
| 120 | 202.0 | 28.1 | |
| 140 | 192.0 | 37.7 | |
| 100 | 453.0 | 39.3 | |
| 120 | 405.0 | 54.0 | |
| 140 | 383.0 | 75.2 | |
|
CBCT Siemens MULTITOM Rax |
Mean per pulse | ||
| 60 | 0.6 | 2.3 | |
| 60 | 1.2 | 4.5 | |
| 80 | 0.6 | 4.5 | |
| 102 | 0.6 | 9.1 | |
| 60 | 2.5 | 9.5 | |
| 80 | 1.2 | 9.9 | |
| 117 | 0.6 | 13.6 | |
| 102 | 1.2 | 16.3 | |
| 80 | 2.5 | 17.4 | |
| 133 | 0.6 | 21.6 | |
| 117 | 1.2 | 23.6 | |
| 102 | 2.5 | 34.6 | |
| 133 | 1.2 | 36.3 | |
| 117 | 2.5 | 44.1 | |
| 133 | 2.5 | 61.0 |
CTDIvol, computed tomography dose index calculated for a 16 cm phantom; CBCT, cone-beam computed tomography; MDCT, multidetector computed tomography; Sn, 0.4 mm tin prefiltration.